In the first half of the nineteenth century it was generally believed that reactions of organic compounds proceeded with minimal structural change. This tenet simplified the elucidation of the numerous substitution, addition and elimination reactions that characterized the behavior of common functional groups.
In the 1970s the solderless breadboard (AKA plugboard, a terminal array board) became available and nowadays the term breadboard is commonly used to refer to these.Breadboard is also a synonym for  prototype .Because the solderless breadboard does not require soldering, it is reusable. This makes it easy to use for creating temporary prototypes and experimenting with circuit design.n the 1970s the solderless breadboard (AKA plugboard, a terminal array board) became available and nowadays the term breadboard is commonly used to refer to these.
To make a basic 1-pound loaf of white bread in a bread machine, add 1 cup of room temperature water, 1 1/2 tablespoons of butter, 2 cups of bread flour, 1 tablespoon of sugar, 1 teaspoon of salt and 1 teaspoon of bread machine yeast to the machine in the order recommended by the manufacturer, and set the bread machine to the basic bread setting.